An economist modeled the demand Q for a certain product as a linear function of the selling price P. The demand was 20,000 units when the selling price was $40 per unit, and the demand was 15,000 units when
the selling price was $60 per unit. Based on the model, what is the demand, in units, when the selling price is
$55 per unit?

the answer is 62.8 cubic units

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)

1st part is 64,000,000

2nd part 500,000

step-by-step explanation:

the answer to this would be 5x^3-6x^2-24 over 3x^2

hope this if needed hmu